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Finding the Fourth Proportional to 209.56, 289.23 and 131.89

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Solution

The fourth proportional to 209.56, 289.23 and 131.89 is: 182.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.56 : 289.23 = 131.89 : x
  2. Step 2: Convert to fraction form
    209.56/289.23 = 131.89/x
  3. Step 3: Cross multiply
    209.56x = 289.23 × 131.89
  4. Step 4: Simplify right side
    209.56x = 38,146.54
  5. Step 5: Solve for x
    x = 38,146.54/209.56
  6. Step 6: Final answer
    x = 182.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.